Valve



I April 4,1933; 1.. A. ROGERS v 1,903,344

VALVE Filed 001;. 10-, 1931 are evolved. If

Patented Apr. 4, 1933 UNITED STATES PATENT OFFICE 10033 A. OF WASHINGTON, DIBTBIG! OF COLUMBIA, DEDIGA'IED '20 THE FREE US! 01' THE PUBLIC j VALVE Application fled October 10, 1981. Serial Io. 588,159.

(Grams mu m acr or men s, 1883, as animal) nan. 30, ms; :70 o. e. m

This a plication is made under'the act ap-. roved pril 30, 1928 and the mventlon erein described ma be manufactured and used by or for the overnment for governmental purposes without payment to me of any royalty thereon.

I hereby dedicate the invention herein described tothe free use of the public, to take effect upon granting of a patent to me.

In the normal ripenin of cheese considerable quantities of s, chiefly carbon dioxide,

ti: cheese is sealed in cans or glass jars without processing or other treatment to interfere with the normal ripening suflicient gas will be produced to lower the oxygen tension to a point at which molds can not grow. This serves a useful pu'r ose in keeping the surface of the cheese free rom owt which injures its appearance and avor, but as the evolutiono gas continues a pressure is developed which will in time be suflicient to cause swelling and sometimes even bursting of the can. This fact has prevented the canning of cheese except by methods which include heating and a material change in the flavor and texture of the product. v

The advantage of a method by which the cheese can be sealed in the can as it comes from the press is so obvious that I have devised a valve which will exclude air from the can so that molds can not grow and will at the same time permit the escape of gas from the can so t at suflicient pressure to cause swellin can not accumulate. This valve is an a a tation and improvement of the well known hnsen valve generally used in laboratories to permit the flow of gas through a tube in onedirection only.

As ordinarily used the Bunsen valve is made by cutting a straight slit or V shaped flap in a short piece of rubber tubing connected at one end with the tube through which the gas flows. The 0 posits end of the rubber tube is closed. re ofgs onthe inside of the tube tends tol'plpen e slitand permitthegastofloww 'e ressure on the outside tends to close it an prelar opening form on cans because of its unwieldy form and because it can not be depended upon to close absolutely tight. v

The valve I have devised is shown in cross section in Figure 1 and in plan in Figure 2.

It consists of a dome-shaped nipple A of pli able rubber to which is attached an annular collar B. In the center-of the disk A is a V-shaped slit D with its apex to the outer or convex side of the dome D. Dome D projects through an annular openin in the top of the can C to which the collar %3 is hermeticall sealed at E. The shape of the valve is suc that in the absence of positive pressure in the can the opening remains closed while any appreciable pressure causes it to open, permitequalized. In practice it would probabl be advisable to provide a loose metallic dish to protect the valve from the contents of the can but this is not an essential part of the devlce.

Having described my'invention I claim: 1. A one-way valve comprising a. domeshaped nipple projecting through an annuin a container and conting the escape of gas until the pressure'is ing'an annular collar afiixed to the container I with the convex side of the nipple situated on the outside of the container.

LORE A. ROGERS.

vent the inward flow of the gas. Obviously I I this form of the valve is not adapted to use 

